Flags in Category: Marshals' Flags

Chequered Flag - End of the race or practice session.
Yellow and Red Stripes - Possible loss of adhesion to the track surface.
White Flag - A service or slow moving vehicle is on the circuit. The white flag is used to indicate what section of the track the vehicle is in.
Red Flag - Immediately cease riding at racing speed and proceed slowly, without overtaking and with caution to the pits or startline as indicated by the marshals.
Black Flag - Shown with a number board indicating to the rider that he must stop within one lap of receiving the signal and report to the Clerk of the Course. A penalty of exclusion may be enforced.
Black and Yellow Quarters - Vehicle must slow sufficiently (about 50mph) and line up, in order, behind the leader while a hazard is removed from the circuit. The race will resume after a green flag is shown.
Blue Flag - To indicate that a quicker competitor is closing or trying to overtake.
Green Flag - All clear, at the end of the danger area controlled by yellow flags. Shown on first lap of practice to indicate marshal posts.
Yellow Flag - Danger, slow down sufficiently to ensure that full control of the vehicle an be retained. No over-taking. Be prepared to stop if necessary.
Black with Yellow Circle - Shown with a number board to indicate mechanical problems of which the rider may not be aware. Rider must leave the circuit immediately.
Black Cross on Yellow Background - To indicate the start of the final lap.

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